Utilities used in classic X desktops, but which desktops like GNOME and KDE generally provide their own versions of, so you may not need if you plan to exclusively use/support one of those desktops, but would want for users with existing desktop environments. Also, software you may need to build and/or run legacy third-party apps, like apps using Xt-based toolkits like Motif/Xaw or software built with Imakefiles.

Things we shipped in this release to complete the monolith -> modular transition, but don't recommend most people use and which will probably not be included in the future. Suggested replacements are shown for each of these.